A pickup truck's weight depends on the model, make and size of the truck. Normally, a pickup truck would weigh from 1750 lbs to 4550 lbs, but even that is just a guess since the exact numbers vary from one truck to the next. A pickup truck's weight depends on the model, make and size of the truck.
rods and cones. The photoreceptor cells of the retina. They are between the pigment epithelium and the bipolar layer of neurons. The rods contain rhodopsin, which is stimulated by light; the cones contain one of three other photopigments, which are stimulated by various wavelengths of visible light (colors).
Cones. Cones are the cells capable of color vision and responsible for high spatial acuity. Unlike the rods, cones do not have individual disks to hold the photochemicals. Photochemicals are in the outer membrane of the cell, and the shape of the cone is determined by folding of the outer membrane.